Fmoc-3-aminobenzoic acid is widely used in peptide synthesis as a protecting group for amino acids. Its primary application is in solid-phase peptide synthesis (SPPS), where the Fmoc group protects the amine functionality during the coupling of amino acids, preventing unwanted side reactions. Once the desired peptide chain is assembled, the Fmoc group can be selectively removed under mild basic conditions, allowing for further elongation or modification of the peptide. Additionally, it serves as a building block in the synthesis of more complex organic molecules, particularly in the development of pharmaceuticals and bioactive compounds. Its stability and ease of deprotection make it a valuable tool in organic and medicinal chemistry research.